We use the perfective will have when we are looking back from a point in time when something will have happened.

By the end of the decade scientists will have discovered a cure for influenza.
I will phone at six o’clock. He will have got home by then.

or looking "back" from the present:

Look at the time. The match will have started.
It’s half past five. Dad will have finished work.

We use would have as the past tense form of will have:

I phoned at six o’clock. I knew he would have got home by then.
It was half past five. Dad would have finished work.

We use would have in past conditionals to talk about something that did not happen:

If it had been a little warmer we would have gone for a swim.
He would have been very angry if he had seen you.
 

Exercise

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Comments

Sir my doubt is passive voice can be used in future conditional sentence as well as future continuous conditional. Please give specific answers with example as it should help me lot. Thanks

Hello raji,

Yes, you can use the passive voice with verbs in the future conditional and future continuous. They're pretty unusual, however. If you want to submit a few sentences, we can tell you whether they're correct or not, though really if they are for homework, you should ask your teacher for help.

All the best,
Kirk
The LearnEnglish Team

Sir please explain whether passive voice could be used in future conditional sentences. And passive voice could be used in all conditional tenses such as conditional present, conditional continues and conditional past perfect tenses with few examples.

Hello raji,

Passive forms can be used in condition sentences without any problems:

If England defeat Iceland, I will buy you dinner!

If Iceland are defeated by England, dinner will be bought for you by me!

 

It does not matter which conditional form is used. Of course, whether or not the passive is good stylistically is another issue. In the example above, the passive in the first clause sounds fine, but in the second clause it is rather awkward.

 

Best wishes,

Peter

The LearnEnglish Team

Hello sir, I want to know about any subtle differences between Nevertheless and Nonetheless.

Hello Mani,

I'd recommend you check these words in a good dictionary, such as those from Cambridge and Oxford. Read all the entries and look at the example sentences. You might also find something useful by doing an internet search for 'difference between nevertheless and nonetheless'.

Good luck!

All the best,
Kirk
The LearnEnglish Team

Sir please clarify me the sentence 'you should be studing' which kind of tense it is. I guess this sentence could be present continuous tense one. Am I correct sir

Hello raji,

Yes, that's correct – it's present continuous.

All the best,
Kirk
The LearnEnglish Team

Sir can we use modal verbs such as could should would in past continuous simple tense and present continuous simple tense. If it so, please explain with examples

Hello raji,

Modal verbs don't have participle forms (e.g. shoulding, shoulded) so they themselves do not have continuous forms. But you can use a modal + be + present participle, for example: 'You should be studying'.

You can also find information on how to use modals to speak about the past (e.g. 'You should have been studying') on our modals + have page.

All the best,
Kirk
The LearnEnglish Team

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